Starlark Processor: Access to previous metrics, store variables

[victornet]

Feature Request

Hi,

this is regarding the new starlark processor plugin, #7194

I would like to calculate the difference between two metrics (previous and current), see #6870

In the readme is mentioned, that the global context is frozen, fileio etc is not possible.

So, is there a possibility to store variables not using the global context? Or read previous values?

Proposal:

Store last value in variable to get difference of metric, detect overflows in values, calculate e.g. response time for disk io, based on timing and number of operations.

Current behavior:

Not possible, global context is frozen.

Desired behavior:

Read/write variables in global context or store previous metric.

Use case:

Gather disk response times for read and write operations.

[danielnelson]

It is not possible right now, but we might allow it in the future after we gain a bit more experience with Starlark. You will be able to use the execd processor, also new in 1.15, to do this.

[essobedo]

The corresponding PR #8447

[ssoroka]

merged in #8447